*{
	margin: 0;
	padding: 0;
}

.aa{
	width: 512px;
	height: 280px;
	background-color: pink;
	margin: 50px auto;
	position: relative;
}

#bb{
	list-style: none;
	width: 100%;
	height: 100%;
}
#bb>li{
	position: absolute;
	top: 0;
	left: 0;
}
.lift-bottom{
	width: 35px;
	height: 70px;
	background-color: #00000050;
	color: #ffffff;
	text-align: center;
	line-height: 70px;
	position: absolute;
	top: 110px;
	left: 0;
	border-radius: 0 5px 5px 0;
}
.right-bottom{
	width: 35px;
	height: 70px;
	background-color: #00000050;
	color: #ffffff;
	text-align: center;
	line-height: 70px;
	position: absolute;
	top: 110px;
	right: -8px;
	border-radius: 5px 0 0 5px;
}
.cc>li{
	list-style: none;
	display: inline-block;
	border: 1px;
	border-radius: 20px;
	width: 10px;
	height: 10px;
	margin-left: 10px;
	background-color:#FFFFFF;
}
.cc{
	position: absolute;
	top: 250px;
	left: 200px;
	
}
.cc>li:hover{
	background-color: red;
}
/* .cc>li:visited{
	background-color: red;
} */
#bb>li:nth-child(1){
	z-index: 100;
}
.indexs{
	z-index: 1000;
}